import java.util.*;

public class Solution {

    public int reverse(int x) {
        int res = 0;
        while (x != 0) {
            int temp = res * 10 + x % 10;
            if (temp / 10 != res)
                return 0;
            res = temp;
            x /= 10;
        }
        return res;
    }

}

